It's important to keep a CRF kitty's weight up. It's so hard for them to maintain their weight, though my Callie had no problems. She loved her carbs, though, and seldom relished eating wet food! LOL Wet food is really best for your kitty, though. You want your kitty at a healthy weight, not too round and not skin & bones. I think the most important thing is for the kitty to eat, even if it's Fancy Feast or Friskies. I know many folks on the Yahoo CRF group feed their kitties Fancy Feast.